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Subject[PATCH 7/9] media: mtk-vcodec: vdec: add media device if using stateless api
Date
From: Yunfei Dong <yunfei.dong@mediatek.com>

The stateless API requires a media device for issuing requests. Add one
if we are being instantiated as a stateless decoder.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
[acourbot: refactor, cleanup and split]
Co-developed-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
---
drivers/media/platform/Kconfig | 1 +
.../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 39 +++++++++++++++++++
.../platform/mtk-vcodec/mtk_vcodec_drv.h | 2 +
3 files changed, 42 insertions(+)

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index ff77c6db55db..cb5ffb98dc09 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -258,6 +258,7 @@ config VIDEO_MEDIATEK_VCODEC
select V4L2_H264
select VIDEO_MEDIATEK_VPU
select MTK_SCP
+ select MEDIA_CONTROLLER
help
Mediatek video codec driver provides HW capability to
encode and decode in a range of video formats
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
index 3d8eaf0746c2..e723f8573322 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
@@ -14,6 +14,7 @@
#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>
+#include <media/v4l2-device.h>

#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_dec.h"
@@ -322,6 +323,31 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
goto err_event_workq;
}

+ if (dev->vdec_pdata->uses_stateless_api) {
+ dev->mdev_dec.dev = &pdev->dev;
+ strscpy(dev->mdev_dec.model, MTK_VCODEC_DEC_NAME,
+ sizeof(dev->mdev_dec.model));
+
+ media_device_init(&dev->mdev_dec);
+ dev->mdev_dec.ops = &mtk_vcodec_media_ops;
+ dev->v4l2_dev.mdev = &dev->mdev_dec;
+
+ ret = v4l2_m2m_register_media_controller(dev->m2m_dev_dec,
+ dev->vfd_dec, MEDIA_ENT_F_PROC_VIDEO_DECODER);
+ if (ret) {
+ mtk_v4l2_err("Failed to register media controller");
+ goto err_reg_cont;
+ }
+
+ ret = media_device_register(&dev->mdev_dec);
+ if (ret) {
+ mtk_v4l2_err("Failed to register media device");
+ goto err_media_reg;
+ }
+
+ mtk_v4l2_debug(0, "media registered as /dev/media%d",
+ vfd_dec->num);
+ }
ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, 0);
if (ret) {
mtk_v4l2_err("Failed to register video device");
@@ -334,6 +360,12 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
return 0;

err_dec_reg:
+ if (dev->vdec_pdata->uses_stateless_api)
+ media_device_unregister(&dev->mdev_dec);
+err_media_reg:
+ if (dev->vdec_pdata->uses_stateless_api)
+ v4l2_m2m_unregister_media_controller(dev->m2m_dev_dec);
+err_reg_cont:
destroy_workqueue(dev->decode_workqueue);
err_event_workq:
v4l2_m2m_release(dev->m2m_dev_dec);
@@ -366,6 +398,13 @@ static int mtk_vcodec_dec_remove(struct platform_device *pdev)

flush_workqueue(dev->decode_workqueue);
destroy_workqueue(dev->decode_workqueue);
+
+ if (media_devnode_is_registered(dev->mdev_dec.devnode)) {
+ media_device_unregister(&dev->mdev_dec);
+ v4l2_m2m_unregister_media_controller(dev->m2m_dev_dec);
+ media_device_cleanup(&dev->mdev_dec);
+ }
+
if (dev->m2m_dev_dec)
v4l2_m2m_release(dev->m2m_dev_dec);

diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
index 755631d0fe92..7071434b5c5b 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
@@ -382,6 +382,7 @@ struct mtk_vcodec_enc_pdata {
* struct mtk_vcodec_dev - driver data
* @v4l2_dev: V4L2 device to register video devices for.
* @vfd_dec: Video device for decoder
+ * @mdev_dec: Media device for decoder
* @vfd_enc: Video device for encoder.
*
* @m2m_dev_dec: m2m device for decoder
@@ -418,6 +419,7 @@ struct mtk_vcodec_enc_pdata {
struct mtk_vcodec_dev {
struct v4l2_device v4l2_dev;
struct video_device *vfd_dec;
+ struct media_device mdev_dec;
struct video_device *vfd_enc;

struct v4l2_m2m_dev *m2m_dev_dec;
--
2.27.0.212.ge8ba1cc988-goog
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